build: move source root into src dir

Author: henryborchers

contrib/create_standalone.py

@@ -383,7 +383,7 @@ def create_completions(entry_point: str, dest: str) -> None:
         }
     elif sys.platform == "win32":
         supported_shells = {
-            "powershell": {"file_name": f"{entry_point}.complete.psm1"}
+            "powershell": {"file_name": f"{entry_point.title()}ArgumentCompleter.psm1"}
         }
     else:
         supported_shells = {}